Answer Posted / vijay nag

find the no of bits required to represent the value n.i.e.
no of elements in the set.This can be done using following
algorithm.
int bin(int n)
{
if(n==1)return 1;
return 1_n/2_1+1;
}
print(char c[12],int b)
{
for(int i=0;i<b;i++)
if(c[i]=='1')
printf("%c",65+i);
}

combinations(int n)
{
int b=bin(n);
char c[12];
for(int i=0;i<pow(2,b);i++)
{
for(int j=1;j<b;j++)
if(i>>1)
c[j-1]='1';
else
c[j-1]='0';

print(c,b);
}

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